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| Application No. | Application Title | Issue Date |
| 20110316621 | LOW INPUT BIAS CURRENT CHOPPING SWITCH CIRCUIT AND METHOD A chopper-stabilized circuit (1) includes pre-chopping circuitry (26) for chopping an input signal (Vin) at a first frequency to generate a first signal. Input chopping circuitry (9) chops the first signal at a second frequency substantially greater... | 12/29/2011 |
| 20110254621 | Signal Processing Circuit A signal processing circuit comprising a chopper amplifier in combination with a circuit or device having an acquisition period, and wherein a clock controlling the chopper amplifier is controlled such that a predetermined or known number of clock transitions occur duri... | 10/20/2011 |
| 20110096944 | HIGH PERCEIVED AUDIO QUALITY CLASS D AMPLIFIER An audio amplifier and a method of operating such an amplifier are disclosed. The audio amplifier includes a switch disabling controller and/or an output set-point controller. The switch disabling controller is configured to disable switching of an output switch circuit... | 04/28/2011 |
| 20100289568 | Low-Noise, Low-Power, Low Drift Offset Correction in Operational and Instrumentation Amplifiers Low-noise, low-power, low drift offset correction in operational and instrumentation amplifiers and amplifiers using the same are disclosed. The amplifiers disclosed use different combinations of chopping and auto-zero techniques. Also disclosed are amplifiers using on-... | 11/18/2010 |
| 20100176879 | Method And Device For Performing Offset Cancellation In An Amplifier Using Floating-Gate Transistors An operational amplifier including: a differential pair of transistors coupled to a pair of input signals; and a pair of floating-gate transistors coupled to the differential pair of transistors, wherein the pair of floating-gate transistors are operable for reducing an... | 07/15/2010 |
| 20100164616 | Chopping technique for continuous time sigma-delta ADCs without Q-noise folding A chopping transconductor includes an transconductor input stage coupled with input signals of the chopping transconductor; a chopping switch coupled with an output of the transconductor input stage, the chopping switch having a switch output; and a cascode transistor, ... | 07/01/2010 |
| 20100079204 | Switched-capacitor amplifier arrangement having a low input current An SC amplifier arrangement and a method for measuring an input voltage are described.... | 04/01/2010 |
| 20100066444 | WIDE-RANGE AND HIGH-RESOLUTION PROGRAMMABLE GAIN AMPLIFIER A first gain stage and a second gain stage having different gains are linked in cascade to construct a wide range and high resolution programmable gain amplifier. The second gain stage can be used only for low gain and low power consumption. Furthermore, two pairs of ch... | 03/18/2010 |
| 20100060352 | Auto-correction feedback loop for offset and ripple suppression in a chopper-stabilized amplifier A chopper-stabilized amplifier includes a main signal path having first and second chopping circuits at the inputs and outputs of a transconductance amplifier, and an auto-correction feedback loop. The feedback loop includes a transconductance amplifier connected to amp... | 03/11/2010 |
| 20100033240 | CHOPPER-STABILIZED INSTRUMENTATION AMPLIFIER FOR IMPEDANCE MEASUREMENT This disclosure describes a chopper stabilized instrumentation amplifier. The amplifier is configured to achieve stable measurements at low frequency with very low power consumption. The instrumentation amplifier uses a differential architecture and a mixer amplifier to... | 02/11/2010 |
| 20100026386 | Amplifier front-end with low-noise level shift An amplifier front-end comprises an input node for receiving a common-mode voltage Vcm, a differential transistor pair having first and second inputs and outputs, a capacitor, a reference voltage Vref, an error correction circuit, and a switching n... | 02/04/2010 |
| 20100019841 | Minimizing Changes In Common Mode Voltage At Inputs Of An Operational Amplifier Used In A Switched Capacitor Differential Amplifier A reference generation circuit provided according to an aspect of the present invention generates a reference potential at different levels in the hold phase of different cycles in an input path of a switched capacitor differential amplifier. In an embodiment, for each ... | 01/28/2010 |
| 20100019842 | Low-noise, wide offset range, programmable input offset amplifier front end and method A programmable offset amplifier includes first (M1) and second (M2) input transistors having differentially connected sources and gates coupled to first (Vin+) and second (Vin−) input voltages. A tail current (Itail1) is ... | 01/28/2010 |
| 20100001792 | Low-noise DC Offset Calibration Circuit and Related Receiver Stage A receiver stage has an operational amplifier, a feedback resistor coupled between an output of the operational amplifier and an input of the operational amplifier, and a DC offset calibration circuit. The DC offset calibration circuit includes a plurality of resistors ... | 01/07/2010 |
| 20100001800 | BOOTSTRAPPED CLASS AB CMOS OUTPUT STAGE A bootstrapped class AB CMOS output circuit and method for generating a class AB output are disclosed. The bootstrapped class AB CMOS output circuit has a voltage offset circuit coupled to an NMOS transistor and a PMOS transistor. The voltage offset circuit has a capaci... | 01/07/2010 |
| 20090309653 | CHOPPER STABILIZED AMPLIFIER A chopper stabilized amplifier has differential inputs, an output, and a low frequency path and a high frequency path from the differential inputs to the output. Chopping occurs, at a chopping frequency, of a differential signal at differential inputs and outputs of an ... | 12/17/2009 |
| 20090302923 | TERMINATED INPUT BUFFER WITH OFFSET CANCELLATION CIRCUIT A system and method for compensation of offset voltage in a digital differential input buffer driven by a terminated transmission line. Offset compensation currents are injected at the output of the first stage of the input buffer, which has a higher impedance than the ... | 12/10/2009 |
| 20090289702 | CURRENT GENERATOR A current generator, including a chopper stabilization operational amplifier, a transistor, and an impedance unit is provided. The chopper stabilization operational amplifier includes a first input terminal, a second input terminal, and an output terminal. The transisto... | 11/26/2009 |
| 20090289703 | OFFSET CANCELLATION CIRCUIT AND DISPLAY DEVICE In an offset cancellation circuit according to the present invention, a first capacitance is connected to a gate of a first transistor of a first active load, and a second capacitance is connected to a gate of a second transistor of the first active load. A switch sets ... | 11/26/2009 |
| 20090278597 | Slew rate and settling time improvement circuitry and method for 3-stage amplifier An operational amplifier (1B) amplifies an input signal (Vin) to produce an output signal (Vout), and includes a 3-stage amplifier (1C) including a first amplifier stage (2) receiving the input signal, a second amplifier stage (3) driven by t... | 11/12/2009 |
| 20090273395 | PREAMPLIFIER AND METHOD FOR CALIBRATING OFFSET VOLTAGES THEREIN A preamplifier includes cascade-connected amplifying circuits, and at least one of the cascade-connected amplifying circuits includes a differential switch pair circuit, a comparator and current sources. The differential switch pair circuit has a pair of differential in... | 11/05/2009 |
| 20090267687 | CHOPPER-STABILIZED AMPLIFIER AND MAGNETIC FIELD SENSOR A chopper-stabilized amplifier has switching networks arranged to support a high frequency clocking signal and to provide a high common mode rejection and a high rejection of an offset component of an input signal. A magnetic field sensor includes a Hall effect element ... | 10/29/2009 |
| 20090231029 | COMBINATION OFFSET VOLTAGE AND BIAS CURRENT AUTO-ZERO CIRCUIT A circuit with an input acquisition loop and an output acquisition loop is used to compensate for the input offset voltage and bias current errors of an operational amplifier.... | 09/17/2009 |
| 20090212856 | ANALOG AMPLIFIER HAVING DC OFFSET CANCELLATION CIRCUIT AND METHOD OF OFFSET CANCELLATION FOR ANALOG AMPLIFIERS An amplifier having DC offset compensation includes at least one input node and a pair of differential output nodes, a biasing circuit coupled to the input node; and a plurality of current sources. Selected ones of said current sources are coupled to the input node to a... | 08/27/2009 |
| 20090195315 | SAMPLE-AND-HOLD AMPLIFIERS A sample-and-hold amplifier is provided. The sample-and-hold amplifier comprises a sample-and-hold circuit and a buffer circuit. The sample-and-hold circuit receives an input signal and transmits the input signal to a first node according to a control signal. The buffer... | 08/06/2009 |
| 20090195306 | SWITCHED-CAPACITOR CIRCUIT HAVING SWITCH-LESS FEEDBACK PATH A switched-capacitor circuit includes a plurality of cascaded differential-input, single-ended-output amplifiers. A negative feedback path, from an output terminal of a last of the cascaded amplifiers to an input terminal of a first of the cascaded amplifiers, is config... | 08/06/2009 |
| 20090195305 | Analog Switch Controller Methods and systems for implementing an analog switch controller to improve linearity of analog switches are described.... | 08/06/2009 |
| 20090167430 | Switched-Capacitor Amplifier Arrangement and Method A switched-capacitor amplifier arrangement and a method to amplify a signal are presented. A forward path has at least one switched capacitor (10) controlled by a clock signal, thus providing an amplification phase (1) of the forward path and an additional... | 07/02/2009 |
| 20090153241 | Simultaneous filtering and compensation circuitry and method in chopping amplifier A chopper-stabilized amplifier (1B) having a first output (25) includes an input chopper (9) for chopping an input signal and applying it to the input of a first amplifier (2) and an output chopper (10) for chopping an output signal of... | 06/18/2009 |
| 20090140802 | SEMICONDUCTOR INTEGRATED CIRCUIT The present invention is directed to reduce offset error voltage in a signal source impedance of analog input signal voltage supplied to an input terminal due to input offset voltage of an operational amplifier in a sampling circuit or a multiplexer coupled to an input ... | 06/04/2009 |
| 20090128232 | SWITCHED-CAPACITOR AMPLIFIER WITH IMPROVED RESET PHASE A switch-capacitor (“SC”) amplifier includes a two-stage operational amplifier (“OP-AMP”), an input SC network, and a feedback SC network. The two-stage OP-AMP includes a first OP-AMP stage having an output coupled to an input of a second OP-AMP stage. The input... | 05/21/2009 |
| 20090115507 | METHOD OF AND APPARATUS FOR REDUCING SETTLING TIME OF A SWITCHED CAPACITOR AMPLIFIER A method and apparatus for reducing settling time of a switched capacitor amplifier. The method includes disconnecting first and second capacitors from an amplifier. When the first and second capacitors are disconnected from the amplifier, they are charged by respective... | 05/07/2009 |
| 20090108929 | Apparatuses and methods for providing offset compensation for operational amplifier Apparatuses and methods for providing offset compensation include a primary amplifier which includes a first output, a second output, a first load input, and a second load input, a first feedback loop connected to the primary amplifier and which includes a first switch ... | 04/30/2009 |
| 20090102558 | OPERATIONAL AMPLIFIER An operational amplifier includes a first differential stage, a second differential stage, a second cascade amplifier stage, an output unit, a first switching control unit and a second switching control unit. When an external signal for stopping operation is input, the ... | 04/23/2009 |
| 20090086072 | DUAL CDS/PxGA CIRCUIT Provided is a dual sampling/pixel gain amplifier (CDS/PxGA) circuit with a shared amplifier, and more particularly, to a dual CDS/PxGA circuit for adjusting a gain of an amplifier based on capacitance. The dual CDS/PxGA circuit comprises: a first sampler for sampling a ... | 04/02/2009 |
| 20090039956 | AMPLIFIER CIRCUITS, IMAGER, SYSTEM AND METHOD OF OPERATION Systems, imagers, amplifiers and methods for use in operating a multi-channel amplifier. The multi-channel amplifier operates in a plurality of channels. A respective plurality of non-overlapping clock signals is generated for connecting a shared operational amplifier i... | 02/12/2009 |
| 20090027116 | METHOD AND INTEGRATED CIRCUIT INCLUDING AN AMPLIFIER CALIBRATION CIRCUIT An integrated circuit including a circuit for calibration and offset compensation of an amplifier method is disclosed. In one embodiment, the method includes providing a reference input signal to the input of an amplifier, coupling the output signal of the amplifier to ... | 01/29/2009 |
| 20090009239 | Low glitch offset correction circuit for auto-zero sensor amplifiers and method An instrumentation amplifier includes first (11A) and second (12A) input amplifiers having outputs (15A,B) coupled to an output amplifier (13). A first auto-zero stage (20) in the first input amplifier is auto-zeroed to a first voltage... | 01/08/2009 |
| 20090009240 | Amplifier Circuit An amplifier circuit block and a compensation circuit block are provided. The amplifier circuit block includes an analog adder for subtracting an output signal of the compensation circuit block from an input signal and an amplifier circuit operating in a wide band. The ... | 01/08/2009 |
| 20080297243 | Linear programmable switch-capacitance gain amplifier A linear programmable switch-capacitance gain amplifier (PGA) is described. The PGA divides the dB-gain curve into several parts by the concept of piece-wise linearity, and then simultaneously executes the dB-linear gain adjustment of MSB and the LSB at the same gain st... | 12/04/2008 |
